45 Y Combinator companies with a founder who worked at SpaceX before.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Building humanity’s multiplanetary future. | W16 | 2,015 | +6% | +20% | 244 | $1.4B | Series F$20M, Nov 2023 |
Intelligence to accelerate human health. | S14 | 306 | −15% | −13% | YC | $97M | Series C$60M, Jun 2022 |
Turning space into a transportation layer for Earth | S21 | 131 | +20% | +30% | 3 | $54.3M | Series A$44M, Nov 2024 |
We Mine Asteroids | W22 | 72 | −4% | +11% | YC | $55.8M | Undisclosed round$216K, Oct 2025 |
Robots for longer-lasting, better-tasting fish at scale. | W22 | 71 | +25% | +78% | 0 | $28M | Series A$22M, Jun 2025 |
Data centers in space | S24 | 66 | +57% | +128% | YC | $444M | Series A$250M, Aug 2026 |
Building and Protecting an Exciting Future | S23 | 62 | 0 | $80M | Series A$80M, Jul 2026 | ||
AppLovin for the food & CPG | S19 | 51 | −2% | −9% | 0 | $8M | Seed$5.3M, Apr 2023 |
Vori is a modern operating system for supermarkets | W20 | 48 | −27% | +7% | YC | $32.1M | Series B$22M, May 2026 |
AI-Powered ERP, MES, and Test Software for Complex Operations | S21 | 42 | +27% | +45% | YC | $18.8M | Series A$15M, Jun 2022 |
Sentry for AI Agents | W24 | 19 | +58% | +138% | 2 | $15M | Series A$15M, Sep 2026 |
We build advanced satcom user terminals | W20 | 19 | +12% | +36% | 3 | $23.6M | Corporate round$10M, Nov 2025 |
AI Driven EPC - Weld Fabrication Contractor | X25 | 18 | +29% | +157% | 1 | SeedJun 2025 | |
Autonomous construction on Earth and beyond | S26 | 15 | +15% | +50% | 2 | $4.5M | YC investment$500K, Aug 2026 |
Automating Office Work for Residential Contractors. | S24 | 14 | +8% | YC | $500K | YC investment$500K, Jan 2025 | |
Space solar arrays that grow to the size of a football field in orbit | W26 | 12 | 5 | $10.5M | Seed$10M, Jul 2026 | ||
Airplanes anyone can fly | S22 | 12 | +71% | +140% | YC | $4.6M | Undisclosed round$4.6M, Oct 2025 |
Agent-Driven Engineering | W24 | 11 | +22% | YC | $5.6M | Seed$5.6M, Dec 2025 | |
Modernizing Chip Manufacturing Infrastructure | S26 | 8 | −11% | 0 | $500K | YC investment$500K, Jun 2026 | |
AI operating system for mega-scale satellite networks. | W26 | 7 | 2 | $6.5M | Grant$6.5M, Apr 2026 | ||
Strength Tracking Wearable | W26 | 6 | YC | ||||
AI agents for on-call | F25 | 6 | YC | $5.5M | Seed$5M, Mar 2026 | ||
AI-powered insurance claims review | S25 | 6 | YC | ||||
Firmware in minutes, not months - rigorously tested on real hardware | S25 | 6 | 0% | YC | $500K | YC investment$500K, Jan 2026 | |
| S24 | 6 | −14% | 0 | $500K | YC investment$500K, Sep 2024 | ||
Employee security done for you. | W23 | 6 | 0% | −14% | 0 | $3.6M | Seed$3.5M, Jun 2023 |
Prime Lightworks Inc. manufactures electric propulsion systems for… | S16 | 5 | 0% | 0% | 0 | $1.2M | Equity crowdfunding$24K, Apr 2023 |
Superintelligent space Robots | W26 | 4 | YC | $100K | YC investment$100K, Mar 2026 | ||
AI for account management and customer success | S25 | 4 | YC | $500K | YC investment$500K, Sep 2025 | ||
Firmware cybersecurity | S23 | 4 | −20% | −20% | YC | $3M | Seed$3M, Sep 2023 |
Real-time generative AI | W23 | 4 | 0 | $500K | YC investment$500K, Apr 2023 | ||
AI that runs factories. | S26 | 3 | 0 | $500K | YC investment$500K, Jun 2026 | ||
The fastest and cheapest way to use AI with ITAR or CUI data. | F24 | 3 | YC | ||||
Long range, battery electric vertical take-off and landing aircraft. | W20Acquired | 3 | 0 | $6.3M | Undisclosed round$2.3M, Jan 2023 | ||
RF test equipment for next-gen spacecraft, drones, and cellphones | X26 | 2 | YC | ||||
We're building robot birds for surveillance. | X26 | 2 | 0 | ||||
The sensitive data redaction layer for AI | F25 | 2 | 0 | $500K | YC investment$500K, Dec 2025 | ||
Fusion reactors for ships | W25 | 2 | YC | $5M | Seed$4.5M, Nov 2025 | ||
Quick-turn bent tube shop for aerospace, energy, industrials | F24 | 2 | 0 | $500K | YC investment$500K, Dec 2024 | ||
Help Institutional Investors manage, track & query their Excel models | S24 | 2 | 0 | $500K | YC investment$500K, Jan 2026 | ||
AI automated prior-auths for private medical practices | W26 | 1 | 0 | $500K | YC investment$500K, Mar 2026 | ||
AI Agents for Complex Engineering Projects | W25 | 1 | YC | $500K | YC investment$500K, Mar 2025 | ||
Moving Things Around in Space, Imaging Space Objects When We're Not | S21 | 211 | 2 | $128M | Series B$75M, Apr 2026 | ||
Improve your appearance by measuring, understanding, and tracking… | F25 | YC | |||||
Autonomous ground stations for drones | S15Inactive | 0 | $870K | Seed$750K, May 2016 |
Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.
Each company is matched to Crustdata by its website. Crustdata adds team size and its change over 6 and 12 months, open roles from job postings, reported funding, and founders' past employers.
Hiring the most counts distinct roles posted in the last 60 days. Growth needs 10+ people today, shrinking 20+ a year ago, so tiny teams do not top the lists. Rebuilt every week.
The numbers on this page come from three Crustdata API calls. Crustdata tags 5,000+ companies with Y Combinator as an investor; swap the filter for any investor, industry or headcount range and track your own list, with founders' work emails one call away.
# 1. every company with Y Combinator as an investor curl https://api.crustdata.com/company/search \ -H "authorization: Bearer $CRUSTDATA_API_KEY" \ -H "x-api-version: 2025-11-01" \ -d '{ "filters": { "field": "funding.investors", "type": "in", "value": ["Y Combinator"] }, "fields": ["basic_info.name", "headcount.total", "headcount.growth_percent", "funding.total_investment_usd"], "limit": 100 }' # 2. open listings per company, last 60 days (limit 0 = counts only) curl https://api.crustdata.com/job/search \ -H "authorization: Bearer $CRUSTDATA_API_KEY" \ -H "x-api-version: 2025-11-01" \ -d '{ "filters": { "op": "and", "conditions": [ { "field": "company.basic_info.company_id", "type": "in", "value": [...] }, { "field": "metadata.date_added", "type": "=>", "value": "2026-08-24" } ]}, "limit": 0, "aggregations": [{ "type": "group_by", "field": "company.basic_info.company_id", "agg": "count" }] }' # 3. the same company filter as a weekly watch: POST /watch/company/search
45 Y Combinator companies have a founder who worked at SpaceX; 43 are active.
9 companies posted roles in the last 60 days, led by Relativity Space (244 roles), Beyond Reach Labs (5 roles) and Farcast (3 roles). 26 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Airhart Aeronautics (+71%), Raindrop (+58%) and Starcloud (+57%).
Largest latest rounds in the last 12 months, after their YC batch: Starcloud ($250M), Singularity ($80M) and Turion Space ($75M).